Lathe-gearing.



H. DUNUI.

LATHE (BEARING.

APPLICAHON man JUNE 15. I916.

l,209,778. Patented Dec. 26,1916.

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I T I 2 0 f Qo 2O q s l k c I LC) M- 1 m j- I m I l UNITED STATESIAltlilltiii OFFI CE.

LATHE-GEARING.

Application filed June 15. 1916.

To u7l whom it may con/rm Be it known that I. Axum-ms StiNn'r. a subjectof the King of Norway. residing at t hristiania. Norway. have inventedcertain new and useful Improvements in Lathe- (rearing: and I do herebydeclare the following to he afull. clear. and exact (lPSCI'lFP tion ofthe invention. such as will enable others skilled in the art to which itappertains to make and use the same. reference heing had to theaccompanying drawings. and to letters or figures of reference markedthereon, which form a part of this specification.

My present invention relates to improvements in turning lathes and moreparticularly to turning lathes of the kind which are provided withchange gear case. and the ohject of my invention is to provide a.turning lathe of this type in which the guide spindle may be drivendirectly from the driving shaft independent of the main spindle as wellas from the main spindle itself. This according to my invention T attainby the arrangement in the change gear case of auxiliary intermediategears in such a way. that the counter shaft for the gear box of thefeeding spindle or guide screw may be driven directly' from the drivingshaft independent of the main spindle. so that all the gears of thechange gear box as Well as of the feeding spindle gear box may heutilized in combination for varying the feed of the guide screw orfeeding spindle. By means oi this arrangement the guide screw may beworked with a number of diti'erent speeds equal to the multiple of thegears of the change gcar box of the guide screw.

It for instance the change gear box has 10 gears and the gear box of theguide screw 30 different gears. the guide screw according to the presentinvention may be worked with 300 different speeds. While if the gearcase of the guide screw may oulv be driven from the main spindle. theguide screw may he worked with 30 diti'crent speeds only e. (I. thenumber of feeds corresponding to the number of gears in its own gen rbox.

On the drawing is shown a. sectional view through a change gear caseaccording to the present invention.

1 is the driving shaft rotated by means of the pulley 2.

3 is the main spindle. which is driven from the driving shaft by meansof the change Specification of Letters Pate-n Pat nted 11030.26, 191i.

Saris do. 1. 1333 gear case i Gig in the usual Way a numhcr a! t c andinterchangeable gears.

5 is the "rtt'r shaft for the gear case of the guide 'r w inn shown) andsaid shaft H 21m, 3.

. to the present invention is directly awn. t-i the driving shaft 1 bymeans of 51M: s 5 it. 10.

PM ear 1" is loo ely mounted on the main spindle 21* and is onn cted toanother gear 11 on i he rxllnTlS of pinion 12 with gear er mountcd oncounter shaft 5.

Ge: ,S 9. it are hoth loosely and slidably mounted on the main spindle3. Gear 9 meshes directly with gear 10. While gear 11 meshes with gear13 by means of intermediate pinion 12 thus ri-vrersing the movement ofcounte1--slml't Fl. Either of the gears 10. 13 may be connected to thecounter shaft 5 b means of the claw coupling 14. 15, which is slidablyhut not rotatabiv mounted on the shat t 5 and may be caused to engagegear 10 or gear 13 alternately by moving the guide fork If.

The gears 9. 11 may he slid in the direction of the arrow on the spindle3 to engage the claw coin'iiing 17 on the same, the gear 9 at the sametime being disengaged from gear 8.

Vhen in engagement with the claw coupling 17 the gears 9. 11 are rotatedwith spindle and thus the counter shaft 5 is driven from the saidspindle by means of its gears 10. 13. each of which may be coupled withsaid shaft by means of the Sikh able claw couplings l-ii. 15.

1' claim:

I. In a lathe gen ring or the like. a change gear case comprising adriving shaft. 5 main spindle. and a counter shaft for transmit tingmotion to a lecd screw. change gears for driving th main spindle fromthe driving shat'l' at diii'erent speeds. gears for driving the teedsci-cw counter shaft from the main spindle and auxiliary gears fordriving the counter shalt directly from the driving shaft iinlcpcndcrtof the main spindle.

2. In a lath g :1 ring or the like. a change gear case connirising adriving sha ft. a mam spindle. and u 'H'ltfl shaft for transmittingmotion to a Feed screw. change gears for driving the main spindle fromthe driving, shaft at dithvrcor owds. gears for driving the feed 9??" or*r shaft directly from the driving h; l lfwvpomlent of the main Ispindle said gears comprising a gear wheel In testimony that I claim theforegoing as loosely mounted on the main spindle, means my invention, Ihave signed my name in for coupling said gear wheel with the mampresence of two subscribing witnesses.

spindle and simultaneously disengaging it ANDREAS SUNDT. 9 from directconnection with the driving Witnesses: shaft, without; disengaging itfrdm the feed Tns. Anne,

screw counter shaft. M. RISER.

